Lysine is an essential amino acid, which can be supplemented by eating a variety of foods rich in amino acids or proteins, commonly used methods are eating beef and lamb, fish, eggs, etc., and if there is a serious lack of it, it may also need to be supplemented by intravenous drug infusion. 1. Dietary supplement: Since many kinds of proteins will release lysine during their decomposition in the digestive system, lysine can be supplemented by consuming protein-rich foods, such as meat, dairy products and legumes, such as soybeans, yams, ginkgo nuts, jujubes, sesame seeds, honey, grapes and lotus seeds. 2. Intravenous infusion: For severe deficiency of lysine or causing organic diseases, amino acid supplements can be rapidly replenished by intravenous infusion. A few patients may experience mild gastrointestinal discomfort after use, and the drug must be used with caution if the patient is suffering from acute ischemic cerebrovascular disease. Adjusting the dietary structure to ensure the intake of essential nutrients such as proteins and vitamins can effectively ensure the intake of lysine and other elements, thus promoting physical health.